"I don't really want to give too much away but the Sentinels are a big feature of this story," he told SFX magazine. "They will be cool and this will deliver on all of the teasers.

"We've all been waiting for this ever since X-Men: The Last Stand showed us one of their heads. Now it is finally coming, and we only have to pay ten quid to see it in the cinema whereas they're having to pay $100 million to deliver it. So I'm delighted."

Millar compared the film to ensemble productions Star Trek and Lost, promising that "every character gets their own moment to shine".